We dare you to find just one flaw in the above invention! It's a device that makes your phone shoot out a face-melting spray -- we refuse to even entertain the idea that such a thing could go wrong.
It's real, by the way -- the Spraytect Pepper Spray iPhone Case is a hard protective shell for your smartphone capable of firing cartridges of law-enforcement-grade pepper spray. It does have several complicated safety mechanisms to prevent accidental firing (and, we suppose, to give the muggers extra time to blind you with a switchblade and make good their escape). It also unlocks endless practical joke potential, to be unleashed any time your friends insist on you taking a picture of them standing in front of some restaurant that was in an episode of Sex and the City.
"Oooh, I love your pretty new phone c- OH DEAR GOD, THERE IS HELL IN MY FUCKING EYES!"
Additionally, the website takes great care to point out that the pepper spray cartridge is detachable, which seems to suggest that the manufacturers are aware of how little an advantage is actually gained by gluing it to your phone. The whole "ease of access in an emergency" base was pretty well covered by the pepper spray key chain -- Spraytect seems to just be combining self-defense equipment with random things on your person, so we assume they're only a few months from unveiling a pocket light tied to a hand grenade and a wallet that shoots fire.